I see and hear things that aren't there and I sometimes have a really high pressure in my head that can make me really dizzy and hurts quite abit I don't know what's causing it but its getting worse

I don't know what kind of an answer you expect, with such a question. There is so much unknown. For example:
- How old are you
- Do you have any medical conditions
- Are you on any medication
- Have you had mental health issues
- When is the last time you spoke to a health professional
- When did these symptoms start
- How do you cope with them
- When was the last time you had a full check up
ANY information would go a long way in helping to advise you.

You need to book an appointment with a doctor so they can find out what's wrong. What's better is they can probibly treat it once they diagnose it.